EP2880074B1 - Compositions alcalines de détergent liquide pour la lessive comprenant des polyesters - Google Patents

Compositions alcalines de détergent liquide pour la lessive comprenant des polyesters Download PDF

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EP2880074B1
EP2880074B1 EP13742609.4A EP13742609A EP2880074B1 EP 2880074 B1 EP2880074 B1 EP 2880074B1 EP 13742609 A EP13742609 A EP 13742609A EP 2880074 B1 EP2880074 B1 EP 2880074B1
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Prior art keywords
oc3h6
composition according
molar average
groups
oc2h4
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German (de)
English (en)
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EP2880074A1 (fr
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Robert John Carswell
Dirk Fischer
Thomas Lindner
Alyn James Parry
John Francis Wells
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Unilever PLC
Unilever NV
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Unilever PLC
Unilever NV
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/37—Polymers
    • C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C11D3/3715—Polyesters or polycarbonates
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/14—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aliphatic hydrocarbons or mono-alcohols
    • C11D1/146—Sulfuric acid esters
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/26—Organic compounds containing nitrogen
    • C11D3/30—Amines; Substituted amines ; Quaternized amines
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/37—Polymers
    • C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C11D3/3723—Polyamines or polyalkyleneimines
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/12—Soft surfaces, e.g. textile

Definitions

  • This invention relates to alkaline liquid laundry detergent compositions comprising polyesters useful as soil release agents in the compositions.
  • Laundry detergent compositions containing polyesters have been widely disclosed in the art.
  • aqueous formulations of soil release oligo- and polyesters with a low viscosity may for example be used in washing and cleaning compositions.
  • EP 0 964 015 A1 discloses soil release oligoesters that may be used as soil release polymers in detergents and that are prepared using polyols comprising 3 to 6 hydroxyl groups.
  • EP 1 661 933 A1 is directed to at room temperature flowable, amphiphilic and nonionic oligoesters prepared by reacting dicarboxylic acid compounds, polyol compounds and water-soluble alkylene oxide adducts and their use as additive in washing and cleaning compositions.
  • the primary focus of this document is on higher stability polymers and higher compatibility polymers for liquids.
  • the performance of the polymers compared to the then state of the art for polyester soil release polymers is not derivable from this document.
  • the performance data even for the fresh polymer (oligoester) is not very spectacular because it was apparently not used as would be conventional for a soil release polymer on a fabric prewashed in the same composition. Thus the skilled worker can derive little information about the likely practical in wash performance benefit of the claimed oligoesters
  • polyesters described in the prior art are in need of improved stability in an alkaline environment, particularly when triethanolamine is also present.
  • This material is useful to neutralise anionic surfactants for use in alkaline compositions, especially linear alkyl benzene sulphonate.
  • Triethanolamaine also catalyses the alkaline hydrolysis of many polyesters otherwise suitable for use in detergents thereby losing soil release power.
  • polyesters often show turbidity upon incorporation.
  • GB 1 466 639 describes heavy duty liquid detergent compositions containing nonionic surfactants, ethanolamine - neutralized anionic surfactants, free ethanolamines and a polymeric soil release agent.
  • the nonionic surfactant should be present in excess over the anionic to boost oily soil removal.
  • soil release polymers of the type claimed deposit under rinse conditions. In the test protocol the composition is applied via an unspecified prewash process. It appears that the "prewash" is needed to get the effect (polyester prewashed with the polymer containing compositions outperform those prewashed with the same composition without the polymer). It is common general knowledge that these early types of soil release polymer did not deposit well during the wash.
  • GB 1 4 66 639 also explains that the compositions comprising the polymers were storage stable with triethanolamine. At several places it also states that they were equally storage stable with or amines etc; for example at Column 9 lines 36 to 43. This is not surprising because in contrast to the polymers with polyethoxylated end modifications described in the already discussed prior art this earlier type of polymers with the polyethoxylation embedded inside the polymer midblock rather than being at the end(s) does not fall apart to make non functional polymers if hydrolysed. Thus, the polymers in GB 1 466 639 can be viewed as compromising performance but having greater stability than the more recent polyester based soil release polymers developed mainly for powders applications. Starting from this prior art the skilled person does not require a more stable polymer. Instead, they must seek a higher performing polymer.
  • compositions comprising triethanolamine in combination with selected new polyesters which have an advantageous stability in alkaline environment, possess a beneficial solubility and advantageously are clearly soluble in alkaline compositions such as alkaline heavy duty washing liquids and also possess advantageous soil release properties.
  • an alkaline liquid laundry detergent composition comprising at least 1 wt% triethanolamine, at least 5 wt% non-soap surfactant and at least 0.5 wt% of a polyester according to the following formula (I) wherein R1 and R2 independently of one another are X-(OC2H4)n-(OC3H6)m wherein X is C 1-4 alkyl, the -(OC2H4) groups and the -(OC3H6) groups are arranged blockwise and the block consisting of the -(OC3H6) groups is bound to a COO group,
  • composition further includes at least 2 wt% nonionic alkoxylated polyethyleneimine with at least 3 moles of alkoxylation per nitrogen.
  • X is preferably methyl.
  • compositions are especially useful as concentrated liquid laundry detergent compositions.
  • the alkaline detergent liquid composition is isotropic.
  • the composition may comprise at least 5 wt% non-soap anionic surfactant.
  • the liquid may comprise linear alkyl benzene sulphonate (LAS), Alkyl ether sulphate (AES), Nonionic and optionally an amine oxide or betaine, the LAS being formed from LAS acid, neutralized at least in part, with TEA. Amines may also be used as the counter ion for the AES. It is preferred for stability reasons to keep the total level of alkali metal ions less than 1 wt% of the composition.
  • the liquid is alkaline. It is preferred that the maximum concentrated composition pH is 8.4, more preferably at most 8.2.
  • soil release agent is applied to materials that modify the fabric surface minimizing the subsequent soiling and making the cleaning of the fabric easier on further washing cycles.
  • variable "m" based on a molar average is a number of from 2 to 5.
  • variable "n" based on a molar average preferably is a number of from 43 to 47, more preferably is a number of from 44 to 46 and even more preferably is 45.
  • the composition comprises polyesters according to the following formula (I) wherein R1 and R2 independently of one another are H3C-(OC2H4)n-(OC3H6)m wherein the -(OC2H4) groups and the -(OC3H6) groups are arranged blockwise and the block consisting of the -(OC3H6) groups is bound to a COO group,
  • polyesters according to formula (I) wherein R1 and R2 independently of one another are H3C-(OC2H4)n-(OC3H6)m wherein the -(OC2H4) groups and the -(OC3H6) groups are arranged blockwise and the block consisting of the -(OC3H6) groups is bound to a COO group,
  • the inventive compositions comprise polyesters according to the following formula (I) wherein R1 and R2 independently of one another are H3C-(OC2H4)n-(OC3H6)m wherein the -(OC2H4) groups and the -(OC3H6) groups are arranged blockwise and the block consisting of the -(OC3H6) groups is bound to a COO group,
  • polyesters according to formula (I) wherein R1 and R2 independently of one another are H3C-(OC2H4)n-(OC3H6)m wherein the -(OC2H4) groups and the -(OC3H6) groups are arranged blockwise and the block consisting of the -(OC3H6) groups is bound to a COO group,
  • the groups -O-C2H4- in the structural units "H3C-(OC2H4)n-(OC3H6)m" are of the formula -O-CH2-CH2-.
  • the groups -O-C3H6- in the structural units indexed with "a”, in the structural units "H3C-(OC2H4)n-(OC3H6)m” are of the formula -O-CH(CH3)-CH2- or -O-CH2-CH(CH3)-, i.e. are of the formula
  • the polyesters may advantageously be prepared by a process which comprises heating dimethyl terephthalate (DMT), 1,2-propylene glycol (PG), and H3C-(OC2H4)n-(OC3H6)m-OH, wherein the -(OC2H4) groups and the -(OC3H6) groups are arranged blockwise and the block consisting of the -(OC3H6) groups is bound to the hydroxyl group -OH and n and m are as defined in formula (I), with the addition of a catalyst, to temperatures of from 160 to 220°C, firstly at atmospheric pressure, and then continuing the reaction under reduced pressure at temperatures of from 160 to 240°C.
  • DMT dimethyl terephthalate
  • PG 1,2-propylene glycol
  • H3C-(OC2H4)n-(OC3H6)m-OH wherein the -(OC2H4) groups and the -(OC3H6) groups are arranged blockwise and the block consisting of the -(OC3H6) groups is bound to
  • a suitable process for the preparation of the polyesters comprises heating dimethyl terephthalate (DMT), 1,2-propylene glycol (PG), and H3C-(OC2H4)n-(OC3H6)m-OH, wherein the -(OC2H4) groups and the -(OC3H6) groups are arranged blockwise and the block consisting of the -(OC3H6) groups is bound to the hydroxyl group -OH and n and m are as defined in formula (I), with the addition of a catalyst, to temperatures of from 160 to 220°C, firstly at atmospheric pressure, and then continuing the reaction under reduced pressure at temperatures of from 160 to 240°C.
  • DMT dimethyl terephthalate
  • PG 1,2-propylene glycol
  • H3C-(OC2H4)n-(OC3H6)m-OH wherein the -(OC2H4) groups and the -(OC3H6) groups are arranged blockwise and the block consisting of the -(OC3H6) groups is bound to the hydroxy
  • Reduced pressure preferably means a pressure of from 0.1 to 900 mbar and more preferably a pressure of from 0.5 to 500 mbar.
  • Sodium acetate (NaOAc) and tetraisopropyl orthotitanate (IPT) is preferably used as the catalyst system in the process.
  • the polyester synthesis is carried out by the reaction of dimethyl terephthalate (DMT), 1,2-propylene glycol (PG), and methyl polyalkyleneglycol using sodium acetate (NaOAc) and tetraisopropyl orthotitanate (IPT) as the catalyst system.
  • DMT dimethyl terephthalate
  • PG 1,2-propylene glycol
  • IPT tetraisopropyl orthotitanate
  • the synthesis is a two-step procedure. The first step is a transesterification and the second step is a polycondensation.
  • DMT Dimethyl terephthalate
  • PG 1,2-propylene glycol
  • PG methyl polyalkyleneglycol
  • NaOAc sodium acetate (anhydrous)
  • IPT tetraisopropyl orthotitanate
  • the mixture is heated up to 170°C for 1 h and then up to 210°C for a further 1 h sparged by a nitrogen stream.
  • methanol is released from the reaction and is distilled out of the system (distillation temperature ⁇ 55°C). After 2h at 210°C nitrogen is switched off and the pressure is reduced to 400 mbar over 3h.
  • the mixture is heated up to 230°C. At 230°C the pressure is reduced to 1 mbar over 160 min. Once the polycondensation reaction has started, 1,2-propylene glycol is distilled out of the system. The mixture is stirred for 4h at 230°C and a pressure of 1 mbar. The reaction mixture is cooled down to 140 - 150 °C. Vacuum is released with nitrogen and the molten Polymer is transferred into a glass bottle.
  • the detergent compositions may comprise one or more optional ingredients, e.g. they may comprise conventional ingredients commonly used in detergent compositions, especially laundry detergent compositions.
  • optional ingredients include, but are not limited to builders, bleaching agents, bleach active compounds, bleach activators, bleach catalysts, photobleaches, dye transfer inhibitors, colour protection agents, anti-redeposition agents, dispersing agents, fabric softening and antistatic agents, fluorescent whitening agents, enzymes, enzyme stabilizing agents, foam regulators, defoamers, malodour reducers, preservatives, disinfecting agents, hydrotropes, fibre lubricants, anti-shrinkage agents, buffers, fragrances, processing aids, colorants, dyes, pigments, anti-corrosion agents, fillers, stabilizers and other conventional ingredients for washing or laundry detergent compositions.
  • compositions according to the invention comprising the polyesters of formula (I) have an advantageous stability in alkaline environment, possess a beneficial solubility and advantageously are clearly soluble in alkaline compositions such as heavy duty washing liquids and also possess advantageous soil release properties.
  • alkaline compositions such as heavy duty washing liquids and also possess advantageous soil release properties.
  • the polyesters possess advantageous foam suppressing properties. This is not only advantageous when the washing or laundry detergent compositions comprising the polyesters of formula (I) are applied but also advantageously reduces foaming during handling of the compositions.
  • Surfactants assist in removing soil from the textile materials and also assist in maintaining removed soil in solution or suspension in the wash liquor.
  • Anionic or blends of anionic and nonionic surfactants are a preferred feature of the present invention.
  • the amount of anionic surfactant is preferably at least 5 wt%. It is preferred that the ratio of nonionic surfactant to total surfactant is at most 3:2.
  • Preferred alkyl sulphonates are alkylbenzene sulphonates, particularly linear alkylbenzene sulphonates having an alkyl chain length of C 8 -C 15 .
  • the preferred counter ion for concentrated alkaline liquids is one or more ethanolamines, for example monoethanolamine (MEA) and triethanolamine (TEA). This introduces TEA into the composition.
  • the linear alkyl benzene sulphonate surfactants may be Detal LAS with an alkyl chain length of from 8 to 15, more preferably 12 to 14.
  • composition comprises an alkyl polyethoxylate sulphate anionic surfactant of the formula (II): RO(C 2 H 4 O) y SO 3 - M + (II) where R is an alkyl chain having from 10 to 22 carbon atoms, saturated or unsaturated, M is a cation which makes the compound water-soluble, especially an ammonium or substituted ammonium cation, or less preferably an alkali metal, and y averages from 1 to 15.
  • R is an alkyl chain having from 10 to 22 carbon atoms, saturated or unsaturated
  • M is a cation which makes the compound water-soluble, especially an ammonium or substituted ammonium cation, or less preferably an alkali metal, and y averages from 1 to 15.
  • R is an alkyl chain having from 12 to 16 carbon atoms, y averages from 1 to 3, preferably y is 3;
  • M may be an ethanolamine, or other material chosen from the list of buffers, to avoid ion exchange of sodium with the counter ion of the LAS.
  • the counter ion can be sodium if low levels of this surfactant are used.
  • the anionic surfactant sodium lauryl ether sulphate (SLES) may be used provided total alkali metal salts in the composition remain low. An average of 3 moles of ethylene oxide per mole is preferred.
  • Nonionic surfactants include primary and secondary alcohol ethoxylates, especially C 8 -C 20 aliphatic alcohol ethoxylated with an average of from 1 to 20 moles of ethylene oxide per mole of alcohol, and more especially the C 10 -C 15 primary and secondary aliphatic alcohols ethoxylated with an average of from 1 to 10 moles of ethylene oxide per mole of alcohol.
  • Non-ethoxylated nonionic surfactants include alkyl polyglycosides, glycerol monoethers and polyhydroxy amides (glucamide). Mixtures of nonionic surfactant may be used.
  • the composition contains from 0.2 wt% to 40 wt%, preferably 1 wt% to 20 wt%, more preferably 5 to 15 wt% of a non-ionic surfactant, such as alcohol ethoxylate, nonylphenol ethoxylate, alkylpolyglycoside, alkyldimethylamineoxide, ethoxylated fatty acid monoethanolamide, fatty acid monoethanolamide, polyhydroxy alkyl fatty acid amide, or N-acyl N-alkyl derivatives of glucosamine (“glucamides").
  • a non-ionic surfactant such as alcohol ethoxylate, nonylphenol ethoxylate, alkylpolyglycoside, alkyldimethylamineoxide, ethoxylated fatty acid monoethanolamide, fatty acid monoethanolamide, polyhydroxy alkyl fatty acid amide, or N-acyl N-alkyl derivatives of glucosamine (“glucamides”).
  • Nonionic surfactants that may be used include the primary and secondary alcohol ethoxylates, especially the C 8 -C 20 aliphatic alcohols ethoxylated with an average of from 1 to 35 moles of ethylene oxide per mole of alcohol, and more especially the C 10 -C 15 primary and secondary aliphatic alcohols ethoxylated with an average of from 1 to 10 moles of ethylene oxide per mole of alcohol.
  • composition may comprise up to 10 wt% of an amine oxide of the formula (III): R 4 N(O)(CH 2 R 3 ) 2 (III)
  • R 4 is a long chain moiety each CH 2 R 3 are short chain moieties.
  • R 3 is preferably selected from hydrogen, methyl and -CH 2 OH.
  • R 4 is a primary or branched hydrocarbyl moiety which can be saturated or unsaturated, preferably, R 4 is a primary alkyl moiety.
  • R 4 is a hydrocarbyl moiety having chain length of from about 8 to about 18.
  • Preferred amine oxides have R 4 is C 8 -C 18 alkyl, and R 3 is H. These amine oxides are illustrated by C 12-14 alkyldimethyl amine oxide, hexadecyl dimethylamine oxide, octadecylamine oxide.
  • a preferred amine oxide material is Lauryl dimethylamine oxide, also known as dodecyldimethylamine oxide or DDAO. Such an amine oxide material is commercially available from Huntsman under the trade name Empigen® OB. Amine oxides suitable for use herein are also available from Akzo Chemie and Ethyl Corp. See McCutcheon's compilation and Kirk-Othmer review article for alternate amine oxide manufacturers.
  • R 4 is H
  • R 4 may be CH 2 OH, for example: hexadecylbis(2-hydroxyethyl)amine oxide, tallowbis(2-hydroxyethyl)amine oxide, stearylbis(2-hydroxyethyl)amine oxide and oleylbis(2- hydroxyethyl)amine oxide.
  • Preferred amine oxides have the formula: O - - N+(Me) 2 R 5 (IV) where R 5 is C 12-16 alkyl, preferably C 12-14 alkyl; Me is a methyl group.
  • Nonionic-free systems with up to 95 %wt LAS can be used provided that some zwitterionic surfactant, such as carbobetaine, is present.
  • a preferred zwitterionic material is a betaine available from Huntsman under the name Empigen® BB. Betaine improves particulate soil detergency in the compositions of the invention.
  • surfactants than the preferred LAS, AES, and nonionic may be added to the mixture of detersive surfactants.
  • cationic surfactants are preferably substantially absent.
  • alkyl sulphate surfactant may be used, especially the non-ethoxylated C 12-15 primary and secondary alkyl sulphates. Soap may be used. Levels of soap are preferably lower than 5 wt%; more preferably lower than 3 wt% most preferably lower than 1 wt%.
  • a second polymer with the soil release polymers in the compositions of the present invention is preferably a polyalkoxylated polyethyleneimine.
  • Polyethylene imines are materials composed of ethylene imine units -CH2CH2NH- and, where branched, the hydrogen on the nitrogen is replaced by another chain of ethylene imine units. These polyethyleneimines can be prepared, for example, by polymerizing ethyleneimine in the presence of a catalyst such as carbon dioxide, sodium bisulphite, sulphuric acid, hydrogen peroxide, hydrochloric acid, acetic acid, and the like. Specific methods for preparing these polyamine backbones are disclosed in U.S. Pat. No.
  • the EPEI comprises a polyethyleneimine backbone of about 300 to about 10000 weight average molecular weight; and the polyalkoxylation comprises polyethoxylation.
  • the polymer is nonionic and has no permanent quaternisation of the polyamine nitrogens; although they may be protonated depending on the pH.
  • a preferred nonionic EPEI may be represented as PEI(X)YEO where X represents the molecular weight of the unmodified PEI and Y represents the average moles of ethoxylation per nitrogen atom in the polyethyleneimine backbone.
  • the ethoxylation may range from 3 to 40 ethoxy moieties per polyalkoxyl chain, preferably it is in the range of 16 to 26, most preferably 18 to 22. A minority of the ethoxy units may be replaced by propoxy units.
  • the alkoxylated polyethyleneimine polymer is present in the composition at a level of between 0.01 and 25 wt%, and preferably at a level of at least 2 wt% and/or less than 9.5 wt%, most preferably from 3 to 9 wt% and with a ratio of non-soap surfactant to EPEI of from 2:1 to 7:1, preferably from 3:1 to 6:1, or even to 5:1.
  • the composition may comprise other polymeric materials, for example: dye transfer inhibition polymers, anti redeposition polymers and cotton soil release polymers, especially those based on modified cellulosic materials.
  • the composition may further comprise a polymer of polyethylene glycol and vinyl acetate, for example the lightly grafted copolymers described in WO2007/138054 .
  • amphiphilic graft polymers based on water soluble polyalkylene oxides as graft base and side chains formed by polymerisation of a vinyl ester component have the ability to enable reduction of surfactant levels whilst maintaining high levels of oily soil removal.
  • a hydrotrope is a solvent that is neither water nor conventional surfactant that aids the solubilisation of the surfactants and other components, especially polymer and sequestrant, in the liquid to render it isotropic.
  • suitable hydrotropes there may be mentioned as preferred: MPG (monopropylene glycol), glycerol, sodium cumene sulphonate, ethanol, other glycols, e.g. di propylene glycol, diethers and urea. MPG and glycerol are preferred hydrotropes.
  • At least one or more enzymes selected from protease, mannanase, pectate lyase, cutinase, esterase, lipase, amylase, and cellulase may be present in the compositions. Less preferred additional enzymes may be selected from peroxidase and oxidase.
  • the enzymes are preferably present with corresponding enzyme stabilizers.
  • the total enzyme content is preferably at least 2 wt%, even as high as at least 4 wt%.
  • Sequestrants are preferably included.
  • Preferred sequestrants include organic phosphonates, alkanehydroxy phosphonates and carboxylates available under the DEQUEST trade mark from Thermphos.
  • the preferred sequestrant level is less than 10 wt% and preferably less than 5 wt% of the composition.
  • a particularly preferred sequestrant is HEDP (1-Hydroxyethylidene -1,1 ,-diphosphonic acid), for example sold as Dequest 2010.
  • HEDP 1-Hydroxyethylidene -1,1 ,-diphosphonic acid
  • Dequest® 2066 Diethylenetriamine penta(methylene phosphonic acid or Heptasodium DTPMP.
  • buffer In addition to the 1% TEA the presence of buffer is preferred for pH control; preferred buffers are MEA, and TEA. They are preferably used in the composition at levels of from 5 to 15 wt%, including the 1% TEA.
  • Other suitable buffer materials may be selected from the group consisting of amino alcohol compounds having a molecular weight above 61 g/mol, which includes MEA.
  • Suitable materials also include, in addition to the already mentioned materials: monoisopropanolamine, diisopropanolamine, triisopropanolamine, monoamino hexanol, 2-[(2-methoxyethyl) methylamino]-ethanol, propanolamine, N-methylethanolamine, diethanolamine, monobutanolamine, isobutanolamine, monopentanolamine, 1-amino-3-(2-methoxyethoxy)- 2-propanol, 2-methyl-4-(methylamino)-2-butanol and mixtures thereof.
  • compositions may contain viscosity modifiers, foam boosting agents, preservatives (e.g. bactericides), pH buffering agents, polyelectrolytes, anti-shrinking agents, anti-wrinkle agents, antioxidants, sunscreens, anti-corrosion agents, drape imparting agents, anti-static agents and ironing aids.
  • the compositions may further comprise, pearlisers and/or opacifiers or other visual cues and shading dye.
  • the liquids may be packaged as unit doses in polymeric film soluble in the wash water.
  • the liquids may be supplied in multidose plastics packs with a top or bottom closure.
  • a dosing measure may be supplied with the pack either as a part of the cap or as an integrated system.
  • R1 and R2 are H3C-(OC2H4)n-(OC3H6)m wherein the -(OC2H4) groups and the -(OC3H6) groups are arranged blockwise and the block consisting of the -(OC3H6) groups is bound to a COO group,
  • R1 and R2 are H3C-(OC2H4)n-(OC3H6)m wherein the -(OC2H4) groups and the -(OC3H6) groups are arranged blockwise and the block consisting of the -(OC3H6) groups is bound to a COO group,
  • a comparative polyester of formula (I') is obtained wherein R1' and R2' are H3C-(OC2H4)n'-(OC3H6)m' wherein the -(OC2H4) groups and the -(OC3H6) groups are arranged blockwise and the block consisting of the-(OC3H6) groups is bound to a COO group,
  • a comparative polyester of formula (I') is obtained wherein R1' and R2' are H3C-(OC2H4)n'-(OC3H6)m' wherein the -(OC2H4) groups and the -(OC3H6) groups are arranged blockwise and the block consisting of the -(OC3H6) groups is bound to a COO group,
  • TexCare SRN100 is a polyester comprising -OOC-(1,4-phenylene)-COO-structural units and -O-CH2CH2-O- structural units.
  • Table 1 Detergent test formulation wt% MPG 15.00 TEA 4.18 NI 7EO 7.28 LAS acid 4.85 SLES 3EO 2.42 Empigen BB 0.86 Prifac 5908 0.86 EPEI 3.14 Perfume 1.39 Polymer 1.00 Demin water and NaOH to adjust to pH 8.2 to 100
  • TexCare SRN-100 is soil release polymer ex Clariant.
  • Table 2 Turbidity of formulation comprising polyester and stability of polyester therein Polyester Turbidity Degree of Hydrolysis TexCare SRN100 clearly soluble 100%
  • Example I clearly soluble 45%
  • Example II clearly soluble 48%
  • Example III clearly soluble 72%
  • Example IV clearly soluble turbid 42% %-values for polyesters of Examples I to IV in comparison / relation to TexCare SRN100.
  • polyesters of Examples I and II were tested for their soil release performance according to the "Dirty-Motor Oil” Test (DMO-Test).
  • the polyesters of Examples I and II were used in concentrations of 1 wt.-% (based on the total weight of the detergent formulation used) and the formulations were stored according to the stability test. The formulations were those described above for the stability test. As test fabric a white polyester standard fabric (30A) was used.
  • the prewashed fabrics (the fabrics were prewashed with the stored detergent formulations comprising the polyesters of Examples I and II) were soiled with dirty motor oil. After 1 h the soiled fabrics were washed again with the stored detergent formulations comprising the polyesters of Examples I and II.
  • the washing conditions for the "prewash” and for the washing procedure after soiling with dirty motor oil were as given in Table 3. Table 3 Washing conditions Washing machine Linitest Hardness of water 15°H Washing temperature 40°C Washing time 30 min Detergent concentration 6g/L
  • Table 4 shows the washing result obtained for a detergent formulation comprising 1 wt.-% of TexCare SRN100.
  • the composition of this detergent formulation comprising TexCare SRN100 was as described above for the stability test.
  • the conditions for the "prewash” and for the washing procedure after soiling were similar to the conditions used for the detergent formulations comprising the polyesters of Examples I and II but with the exception that in case of TexCare SRN100 the "prewash” and the washing procedure after the soiling of the fabrics with dirty motor oil was done using "fresh" detergent formulation (no alkaline storage).
  • Table 4 Test results (washing performance) Polyester results for "fresh” formulation or after storage Washing Performance TexCare SRN100 fresh 100% Example I after storage 96%
  • Example II was further tested in the concentrated laundry liquid composition given in Table 5.
  • This composition is designed to be dosed at 20 ml per wash in typical European front loading automatic washing machine.
  • Table 5 wt% MPG 15.00 TEA 3.50 MEA 3.05 NI 7EO 12.74 LAS acid 8.49
  • EPEI 5.50 Dequest 2010 2.50 Preservative 0.016 Polymer (Example II) 3.75 Perfume 1.39 Demin water to 100 Measured product pH 8.05
  • wash performance was assessed using tergotometer wash protocol.
  • Table 6 Tergotometer Washing conditions Washing machine Tergotometer Hardness of water 26°FH Washing temperature 25°C Washing time 30 min Detergent concentration 1.3g/L
  • the ⁇ E values being the colour differences defined as the Euclidian distance between the stain and clean cloth in L*a*b* colour space.

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Claims (17)

  1. Composition détergente liquide alcaline pour le linge comprenant au moins 1 % en poids de triéthanolamine, au moins 5 % en poids d'un tensloactif non savon et au moins 0,5 % en poids d'un polyester de formule (I) suivante :
    Figure imgb0012
     dans laquelle
    R1 et R2, indépendamment l'un de l'autre, sont X-(OC2H4)n-(OC3H6)m où X est un alkyle en C1 à C4, les groupes -(OC2H4) et les groupes -(OC3H6) sont arrangés en blocs et le bloc constitué des groupes -(OC3H6) est lié à un groupe COO,
    n, sur la base d'une moyenne molaire, est un nombre de 40 à 50,
    m, sur la base d'une moyenne molaire, est un nombre de 2 à 5, et
    a, sur la base d'une moyenne molaire, est un nombre de 6 à 7.
  2. Composition selon la revendication 1, caractérisée en ce que n, sur la base d'une moyenne molaire, est un nombre de 43 à 47.
  3. Composition selon la revendication 2, caractérisée en ce que n, sur la base d'une moyenne molaire, est un nombre de 44 à 46.
  4. Composition selon la revendication 3, caractérisée en ce que n, sur la base d'une moyenne molaire, vaut 45.
  5. Composition selon une ou plusieurs des revendications 1 à 4, caractérisée en ce que R1 et R2, indépendamment l'un de l'autre, sont H3C-(OC2H4)n-(OC3H6)m où les groupes -(OC2H4) et les groupes -(OC3H6) sont arrangés en blocs et le bloc constitué des groupes -(OC3H6) est lié à un groupe COO,
    n, sur la base d'une moyenne molaire, est un nombre de 44 à 46,
    m, sur la base d'une moyenne molaire, vaut 2, et
    a, sur la base d'une moyenne molaire, est un nombre de 6 à 7.
  6. Composition selon la revendication 5, caractérisée en ce que n, sur la base d'une moyenne molaire, vaut 45.
  7. Composition selon une ou plusieurs des revendications 1 à 4, caractérisée en ce que R1 et R2, indépendamment l'un de l'autre, sont H3C-(OC2H4)n-(OC3H6)m où les groupes -(OC2H4) et les groupes -(OC3H6) sont arrangés en blocs et le bloc constitué des groupes -(OC3H6) est lié à un groupe COO,
    n, sur la base d'une moyenne molaire, est un nombre de 44 à 46,
    m, sur la base d'une moyenne molaire, vaut 5, et
    a, sur la base d'une moyenne molaire, est un nombre de 6 à 7.
  8. Composition selon la revendication 7, caractérisée en ce que n, sur la base d'une moyenne molaire, vaut 45.
  9. Composition selon l'une quelconque des revendications précédentes, comprenant au moins 2 % en poids d'une polyéthylène-imine alcoxylée.
  10. Composition selon l'une quelconque des revendications précédentes, comprenant au moins 5 % en poids d'un tensioactif anionique.
  11. Composition selon l'une quelconque des revendications précédentes, comprenant un tensioactif alkyléthersulfate anionique.
  12. Composition selon l'une quelconque des revendications précédentes, comprenant un alkylbenzènesulfonate linéaire (LAS), le LAS étant neutralisé à partir d'acide LAS, au moins en partie, avec de la triéthanolamine (TEA).
  13. Composition selon l'une quelconque des revendications précédentes, comprenant au moins 2 % en poids du polyester.
  14. Composition selon l'une quelconque des revendications précédentes, comprenant au moins 0,5 % en poids d'un oxyde d'amine.
  15. Composition selon l'une quelconque des revendications précédentes, comprenant jusqu'à 25 % en poids d'un hydrotrope.
  16. Composition selon l'une quelconque des revendications précédentes, comprenant au plus 1 % en poids d'ions de métal alcalin.
  17. Composition selon l'une quelconque des revendications précédentes, comprenant moins de 5 % en poids de savon, de préférence moins de 3 % en poids, tout spécialement moins de 1 % en poids.
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